Active filter to Class-D amp.

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Hello,
I have got the TPA3122 class-d amp to work perfectly, and now I want to make an active low - and highpass filter so I can create a soundsystem.
My only problem is that I only get noise when I setup my activefilter with a TL072 opamp, so I'm wondering if there are some specific opamp to use with class-d?
Here is an example of a setup I used with no results.
An externally hosted image should be here but it was not working when we last tested it.
 
Hmm.. link doesn't work, I'll try again.

Regards,
Simon H.A.
 

Attachments

  • LOL.png
    LOL.png
    3.3 KB · Views: 106
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.